yes I understand that but as they are tightening up I would keep the extension for at the end ,with a METV you will be allowed back you are not getting 60 day exemptions but a 60 day visa,you will have to do a boarder run after the extension anyway.
don't bother getting an extension on a multiple entry tourist visa it is valid for 6 months just do a boarder run every 60 days and you will get another 60 days each time ,then if you want to stay longer you can do a boarder run a few days before the 6 months is up and you will get another 60 days taking it to 8 months ,then you can get an extension if required to 9 months.